A replaceable electric toothbrush head

Abstract

The utility model discloses a replaceable electric toothbrush head, including toothbrush host computer, the top fixedly connected with connecting seat of toothbrush host computer, the top of connecting seat is equipped with the brush head stem, the top fixedly connected with toothbrush head of brush head stem, the inner ring of connecting seat is equipped with a plurality of sliding slot, the inner wall of each sliding slot all is fixedly connected with the tension spring, the end of each tension spring all is fixedly connected with the limit stopper, the bottom fixedly connected with the connecting head of brush head stem, the bottom of connecting head is provided with the conical limit protruding. The utility model thread limit cover moves down extruding slide rod, can promote limit stopper closely and be combined on conical limit protruding top, can constitute the rigid limit to the upwards, avoids the inside of connecting seat from falling off, compared with the single cooperation of traditional bolt and socket, avoids the problem of gap expansion caused by vibration friction, can resist high frequency vibration load, prevents the brush head loose separation.

Description

Technical Field

[0001] This application relates to the field of electric toothbrush technology, and more particularly to a replaceable electric toothbrush head. Background Technology

[0002] Electric toothbrushes are oral cleaning devices that use an electric motor to drive the brush head to achieve high-frequency vibration. Compared with traditional manual toothbrushes, they significantly improve cleaning efficiency and have become the mainstream product in modern oral care. As the core component of an electric toothbrush that directly contacts the mouth, the brush head is affected by factors such as bristle wear and bacterial growth, and needs to be replaced about every 3 months. Therefore, replaceable brush heads have become the standard configuration of electric toothbrushes.

[0003] Most replaceable brush heads on the market currently use a pin-to-pin connection method. This means the brush head handle has a matching pin, and the toothbrush main unit has a corresponding pin. The pin is inserted into the pin to form a detachable connection. However, this pin-to-pin structure lacks sufficient strength and is difficult to adapt to the high-frequency vibration of electric toothbrushes. For example, when an electric toothbrush is working, the brush head needs to continuously withstand high-frequency vibration loads. Over time, the mating surfaces of the pin and the pin will experience continuous friction due to vibration, causing the gap to gradually increase and the connection tightness to decrease. Therefore, under the combined action of vibration and external force, the brush head is prone to loosening from the main unit connection, and in severe cases, it may detach completely, interrupting the brushing process, reducing cleaning efficiency, and potentially causing oral mucosal injury due to accidental brush head detachment. Therefore, to solve these problems, we provide a replaceable electric toothbrush head. Summary of the Invention

[0004] The purpose of this invention is to provide a replaceable electric toothbrush head to solve the problem mentioned in the background art: when current electric toothbrushes are in operation, the brush head needs to continuously withstand high-frequency vibration loads. During long-term use, the mating surfaces of the pin and the socket will continuously rub due to vibration, causing the mating gap to gradually increase and the connection tightness to continuously decrease. Therefore, under the combined action of vibration and external force, the brush head is prone to loosening from the connection point of the main unit, and in severe cases, it may detach directly, thereby interrupting the brushing process, reducing cleaning efficiency, and causing oral mucosal injury due to accidental brush head detachment.

[0005] The embodiments of this application adopt the following technical solutions: A replaceable electric toothbrush head includes a toothbrush main unit. A connecting seat is fixedly connected to the top of the toothbrush main unit. A brush head rod is provided above the connecting seat. A toothbrush head is fixedly connected to the top of the brush head rod. The inner ring of the connecting seat has multiple sliding grooves. A tension spring is fixedly connected to the inner wall of each sliding groove. A limit block is fixedly connected to the end of each tension spring that is close to each other. A connecting head is fixedly connected to the bottom of the brush head rod. A conical limiting protrusion is provided at the bottom of the connecting head. The bottom surface of each limit block contacts the upper surface of the conical limiting protrusion. A sliding hole is provided in the inner wall of each sliding groove. A sliding rod is fixedly connected to the side of each limit block that is far from each other. The far end of each sliding rod extends into the interior of each sliding hole. A thread is provided on the outer surface of the connecting seat. A threaded limit cover is threadedly connected to the outer surface of the connecting seat. The far end of each sliding rod contacts the inner ring of the threaded limit cover. A protective member is provided on one side of the toothbrush head.

[0006] Preferably, a bearing ring is fixedly embedded in the bottom surface of the connecting seat, a connecting shaft is fixedly connected to the inner ring of the bearing ring, and a connecting plate is fixedly connected to the top end of the connecting shaft.

[0007] Preferably, the protective component includes a protective cover, the bottom surface of which is fixedly connected to a connecting support plate, and one side of the connecting support plate is fixedly connected to an arc-shaped retaining ring, the inner ring of which is adapted to the surface of the top end of the brush head rod.

[0008] Preferably, a buffer pad is fixedly embedded in the inner bottom wall of the connector, the upper surface of the buffer pad is in contact with the bottom surface of the conical limiting protrusion, an annular sealing ring is fixedly embedded in the inner ring of the connector, the inner ring of the annular sealing ring is in contact with the outer surface of the connector, multiple anti-slip protrusions are provided on the outer surface of the threaded limiting cover, and two silicone anti-slip layers are fixedly connected to the outer surface of the toothbrush main unit.

[0009] Preferably, the bottom surface of the connector is provided with a connecting slot, the top of the connecting plate extends into the interior of the connecting slot, and the outer surface of the connecting plate is adapted to the inner wall of the connecting slot.

[0010] Preferably, a switch button is fixedly embedded on the front of the toothbrush main unit, and a charging socket is fixedly embedded on one side of the toothbrush main unit.

[0011] The above-described technical solutions adopted in the embodiments of this application can achieve the following beneficial effects: 1. This replaceable electric toothbrush head, through the insertion of the connecting plate into the connecting slot, can first form a positioning, preventing the brush head shaft from rotating or shifting during vibration, reducing uneven stress on the connection part. Subsequently, the threaded limit cover moves down and presses the slide rod, which can push the limit block to fit tightly against the conical limit protrusion, forming an upward rigid limit, preventing the connector from falling off the inside of the connector seat. Compared with the traditional single fit of pin and socket, it avoids the problem of gap expansion caused by vibration friction, can resist high-frequency vibration load, prevent the toothbrush head from loosening and falling off, eliminate the risks of brushing interruption, reduced cleaning efficiency and oral mucosal impact damage, and ensure safety and stability of use.

[0012] 2. This replaceable electric toothbrush head, by rotating the threaded limit cover in the reverse direction, allows the tension of the spring to automatically reset and unlock the limit block. No additional tools are required, making operation simple and efficient. This solves the problems of difficult disassembly or easy jamming in traditional plug-in structures. The buffer pad inside the connector can absorb the impact force when the brush head is inserted, reducing the wear and tear from hard collisions between parts. The annular sealing ring effectively prevents water vapor from entering during brushing, avoiding the problems of internal circuit damage or bacterial growth caused by water ingress in traditional structures. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 See: A three-dimensional structural diagram of the replaceable electric toothbrush head of this utility model from the front view; Figure 2 See: A three-dimensional structural diagram of the brush head rod in the replaceable electric toothbrush head of this utility model, viewed from below; Figure 3 See: A front sectional view of the connecting base in the replaceable electric toothbrush head of this utility model; Figure 4 See: A top sectional view of the connecting seat in the replaceable electric toothbrush head of this utility model; Figure 5 The diagram shows a three-dimensional view of the protective component in the replaceable electric toothbrush head of this utility model.

[0014] In the diagram: 1. Toothbrush main unit; 2. Connecting base; 3. Brush head rod; 4. Toothbrush head; 5. Protective component; 501. Protective cover; 502. Connecting support plate; 503. Arc-shaped retaining ring; 6. Connecting head; 7. Connecting slot; 8. Connecting plate; 9. Conical limiting protrusion; 10. Slide groove; 11. Tension spring; 12. Slide rod; 13. Limiting block; 14. Slide hole; 15. Threaded limiting cover; 16. Bearing ring; 17. Connecting shaft; 18. Buffer pad; 19. Annular sealing ring; 20. Charging socket; 21. Switch button; 22. Silicone anti-slip layer; 23. Anti-slip protrusion. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example 1

[0016] As attached Figures 1-5 The replaceable electric toothbrush head shown includes a toothbrush main unit 1, which integrates a power supply and control module. It is powered via a charging socket 20, and a switch button 21 controls the operation of the internal vibration component. A connecting base 2 is fixedly connected to the top of the toothbrush main unit 1, and a brush head rod 3 is located above the connecting base 2. A toothbrush head 4 is fixedly connected to the top of the brush head rod 3. Multiple sliding grooves 10 are formed on the inner ring of the connecting base 2, and a tension spring 11 is fixedly connected to the inner wall of each sliding groove 10. A limit block 13 is fixedly connected to one end of each tension spring 11 that is close to the other. A connecting head 6 is fixedly connected to the bottom end of the brush head rod 3. The bottom of the connector 6 is provided with a conical limiting protrusion 9. The bottom surface of each limiting block 13 is in contact with the upper surface of the conical limiting protrusion 9. The inner wall of each slide groove 10 is provided with a sliding hole 14. Each limiting block 13 is fixedly connected to a slide rod 12 on its opposite side. The opposite end of each slide rod 12 extends into the interior of each slide hole 14. The outer surface of the connector 2 is provided with a thread. The outer surface of the connector 2 is threaded with a threaded limiting cover 15. The opposite end of each slide rod 12 is in contact with the inner ring of the threaded limiting cover 15. A protective part 5 is provided on one side of the toothbrush head 4.

[0017] As can be seen from the above description, this utility model has the following beneficial effects, wherein: by the downward movement of the threaded limiting cover 15 to squeeze the slide rod 12, the limiting block 13 can be pushed to fit tightly against the conical limiting protrusion 9, which can form an upward rigid limit, preventing the connector 6 from falling off from the inside of the connector seat 2. Compared with the traditional single cooperation of pin and socket, it avoids the problem of gap expansion caused by vibration and friction, can resist high-frequency vibration load, and prevent the brush head from loosening and falling off. Example 2

[0018] Based on Embodiment 1, the solution in Embodiment 1 will be further described in detail below, with reference to the specific working method described in detail: like Figures 1-5 As shown, in a preferred embodiment, a bearing ring 16 is fixedly embedded in the bottom surface of the connecting seat 2. A connecting shaft 17 is fixedly connected to the inner ring of the bearing ring 16. A connecting clamping plate 8 is fixedly connected to the top of the connecting shaft 17. The protective component 5 includes a protective cover 501. A connecting support plate 502 is fixedly connected to the bottom surface of the protective cover 501. An arc-shaped retaining ring 503 is fixedly connected to one side of the connecting support plate 502. The arc-shaped retaining ring 503 is made of food-grade silicone material, which has both elasticity and wear resistance. It fits the surface of the brush head rod 3 to achieve a stable engagement, providing support for the protective cover 501 to protect the toothbrush head 4. The inner ring of the arc-shaped retaining ring 503 is compatible with the surface of the top of the brush head rod 3. Furthermore, the bearing ring 16 provides flexible rotational support for the connecting shaft 17, allowing the connecting shaft 17 to drive the top connecting plate 8 to rotate freely. When the brush head rod 3 is inserted, the connecting plate 8 can quickly align with the connecting slot 7 on the bottom surface of the connecting head 6 by rotation, solving the problem of difficult alignment in traditional fixed snap-fit ​​structures. The arc-shaped retaining ring 503 in the protective component 5 achieves a firm snap-fit ​​due to its compatibility with the top of the brush head rod 3, providing stable support for the connecting support plate 502. This allows the protective cover 501 to be placed on the outside of the toothbrush head 4, effectively isolating the bristles from external dust and moisture, and preventing bristle deformation or bacterial growth when idle.

[0019] like Figures 1-5As shown, in a preferred embodiment, a buffer pad 18 is fixedly embedded in the inner bottom wall of the connector 2, and the upper surface of the buffer pad 18 contacts the bottom surface of the conical limiting protrusion 9. An annular sealing ring 19 is fixedly embedded in the inner ring of the connector 2, and the inner ring of the annular sealing ring 19 contacts the outer surface of the connector 6. The outer surface of the threaded limiting cover 15 is provided with multiple anti-slip protrusions 23. Two silicone anti-slip layers 22 are fixedly connected to the outer surface of the toothbrush main unit 1. A connecting slot 7 is opened on the bottom surface of the connector 6. The top end of the connecting plate 8 extends into the interior of the connecting slot 7, and the outer surface of the connecting plate 8 is adapted to the inner wall of the connecting slot 7. A switch is fixedly embedded in the front of the toothbrush main unit 1. Button 21 and a charging socket 20 are fixedly embedded on one side of the toothbrush main unit 1. Furthermore, the contact between the buffer pad 18 and the bottom surface of the conical limiting protrusion 9 can absorb the axial impact force when the brush head is inserted, reducing the hard collision between the conical limiting protrusion 9 and the connecting seat 2. The annular sealing ring 19 fits tightly against the surface of the connector 6 and the inner ring of the connecting seat 2, filling the gap between them and forming a waterproof sealing barrier to prevent water and toothpaste residue from seeping into the interior of the connecting seat 2 during brushing. The switch button 21 provides users with convenient start and stop control and can quickly adjust the working status of the electric toothbrush. The charging socket 20 replenishes the power of the toothbrush main unit 1, ensuring the continuous and stable operation of the device.

[0020] The working process of this utility model is as follows: When using this replaceable electric toothbrush head, firstly, during installation, insert the connector 6 at the bottom of the brush head rod 3 into the connector seat 2, and insert the connector plate 8 into the connector slot 7. Then, rotate the threaded limiting cover 15 on the surface of the connector seat 2, which moves downward on the surface of the connector seat 2 and presses the slide rod 12, which moves along the slide hole 14 towards the center, further pressing the limiting block 13. This allows multiple limiting blocks 13 to move above the conical limiting protrusion 9, limiting the area above the conical limiting protrusion 9, thereby securing the connector 6 inside the connector seat 2.

[0021] When disassembling, rotate the threaded limit cover 15 in the opposite direction. The squeezing force of its inner wall on the slide rod 12 disappears, the tension spring 11 contracts and drives the limit block 13 back into the slide groove 10, releasing the lock on the conical limit protrusion 9. Then the brush head rod 3 can be pulled out upward to complete the replacement. In addition, the buffer pad 18 in the connecting seat 2 can absorb the impact force during insertion, and the annular sealing ring 19 enhances the sealing of the connection and prevents water vapor from entering. This is the working process and working principle of the device.

[0022] It should also be noted that, in terms of circuit structure, the drive and control circuits of this utility model are common and mature technologies. Those skilled in the art can select appropriate circuit components to build the circuit according to the power requirements and control requirements of the equipment. For the power supply components, common general power supply equipment on the market can be used, as long as it meets the voltage and current requirements of the equipment. No special design is required. In addition, the electrical components in this application are all existing technologies, and this application will not elaborate on their models or internal structures.

[0023] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalent elements of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A replaceable electric toothbrush head, comprising a toothbrush main unit (1), wherein a connecting seat (2) is fixedly connected to the top of the toothbrush main unit (1), a brush head rod (3) is provided above the connecting seat (2), and a toothbrush head (4) is fixedly connected to the top of the brush head rod (3), characterized in that: The inner ring of the connecting seat (2) is provided with multiple sliding grooves (10), and each sliding groove (10) is fixedly connected to a tension spring (11) on its inner wall. Each tension spring (11) is fixedly connected to a limit block (13) at one end close to each other. The bottom end of the brush head rod (3) is fixedly connected to a connector (6). The bottom of the connector (6) is provided with a conical limit protrusion (9). Each sliding groove (10) is provided with a sliding hole (14) on its inner wall. Each limit block (13) is fixedly connected to a sliding rod (12) on one side away from each other. Each sliding rod (12) extends to the interior of each sliding hole (14) at one end away from each other. The outer surface of the connecting seat (2) is provided with threads. The outer surface of the connecting seat (2) is threadedly connected to a threaded limit cover (15). The toothbrush head (4) is provided with a protective part (5) on one side.

2. The replaceable electric toothbrush head according to claim 1, characterized in that: The bottom surface of the connecting seat (2) is fixedly inlaid with a bearing ring (16), the inner ring of the bearing ring (16) is fixedly connected to a connecting shaft (17), and the top end of the connecting shaft (17) is fixedly connected to a connecting plate (8).

3. A replaceable electric toothbrush head according to claim 1, characterized in that: The protective component (5) includes a protective cover (501), the bottom surface of which is fixedly connected to a connecting support plate (502), and one side of the connecting support plate (502) is fixedly connected to an arc-shaped retaining ring (503), and the inner ring of the arc-shaped retaining ring (503) is adapted to the surface of the top end of the brush head rod (3).

4. A replaceable electric toothbrush head according to claim 1, characterized in that: The inner bottom wall of the connecting seat (2) is fixedly inlaid with a buffer pad (18), the upper surface of the buffer pad (18) is in contact with the bottom surface of the conical limiting protrusion (9), and the inner ring of the connecting seat (2) is fixedly inlaid with an annular sealing ring (19), the inner ring of the annular sealing ring (19) is in contact with the outer surface of the connector (6).

5. A replaceable electric toothbrush head according to claim 2, characterized in that: The bottom surface of the connector (6) is provided with a connecting slot (7), the top of the connecting plate (8) extends into the interior of the connecting slot (7), and the outer surface of the connecting plate (8) is adapted to the inner wall of the connecting slot (7).

6. A replaceable electric toothbrush head according to claim 1, characterized in that: The outer surface of the threaded limit cover (15) is provided with multiple anti-slip protrusions (23), and the outer surface of the toothbrush host (1) is fixedly connected with two silicone anti-slip layers (22).

7. A replaceable electric toothbrush head according to claim 1, characterized in that: The toothbrush host (1) has a switch button (21) fixedly embedded on the front and a charging socket (20) fixedly embedded on one side of the toothbrush host (1).

8. A replaceable electric toothbrush head according to claim 1, characterized in that: The bottom surface of each of the limiting blocks (13) is in contact with the upper surface of the conical limiting protrusion (9), and the opposite ends of each of the sliding rods (12) are in contact with the inner ring of the threaded limiting cover (15).

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